[time-nuts] FE-5680A 1 pps photo

[Bob Bownes]

Just for completeness sake, here is a screen capture off of my DSA-602 of
the 1pps. Note that the trace starts 500ns _before_ the 1pps triggers the
capture. Ah the wonders of digital sampling.


http://www.fastbobs.com/pictures/1pps.jpg

Also as a pdf

http://www.fastbobs.com/pictures/1pps.pdf

Bob


On Thu, Feb 2, 2012 at 1:20 PM, John Howell <j at howell61.f9.co.uk> wrote:

> Not odd but my mistake, I took a picture on both 'scopes and the Fluke
> gave marginally better results, the text referred to the wrong one. Sorry
> for the confusion.
>
> On 2 Feb 2012, at 16:43, David wrote:
>
> > Odd.  Did Tektronix mark it Fluke PM3082? :)
> >
> > It is nice to know that the current generation of digital cameras can
> > be used for this application.  It is too bad that the image has so
> > much noise.
> >
> > On Thu, 2 Feb 2012 16:27:03 +0000, John Howell <j at howell61.f9.co.uk>
> > wrote:
> >
> >> ........and here's another photo of the pulse from one of the newer
> breed of FE-5680A that require the 5V.
> >> Taken with a Sony Cybershot H5, 8 sec exposure, 'scope is an elderly
> Tektronix 2252
> >>
> >> http://dl.dropbox.com/u/1690159/1PPS_1%20FE-5680E.jpg
> >>
> >> On 2 Feb 2012, at 15:50, Alberto di Bene wrote:
> >>
> >>> I managed to take a photo at the scope screen showing the 1 pps pulse
> >>> from an old FE-5680A (the one that does not need the 5V and does not
> >>> output the oscillator signal - just the 1pps).
> >>>
> >>> Exposure was 30 sec, F9. The signal was barely visible with naked eye,
> >>> and some jittering is present. The room of course was in complete
> >>> darkness, but the reflex of the stand-by led of another instrument
> >>> can be seen...
> >>>
> >>> http://dl.dropbox.com/u/15089947/1pps.gif
>
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
>